OBSERVATIONS TAKEN IN INDIA. 
305 
Dates and Hours of the Maximum and Minimum Pressure at Madras, and extreme 
range of Barometer at Madras, Bombay, Calcutta, &c. 
Years. 
Max. Pres. 
Date. 
Hour. 
Min. Pres. 
Date. 
Hour. 
Annual 
range at 
Madras. 
Annual 
range at 
Bombay. 
Annual 
range at 
Calcutta. 
Annual 
range at 
Poona. 
Annual 
range at 
Maha- 
buleshwur. 
Annual 
range at 
Dodabetta. 
1842. 
30- 156 
Dec. 5. 
h m 
9 41 A.M. 
29-454 
June 1. 
h m 
3 41 P.M. 
0-702 
*0-672 
1843. 
30-208 
Jan. 24. 
9 41 A.M. 
29-256 
May 21. 
3 41 P.M. 
0-952 
0-705 
1844. 
30-170 
Jan. 16. 
9 41 A.M. 
29-537 
June 1. 
4 41 P.M. 
0-633 
0-661 
0-957 
1845. 
30-196 
Jan. 10. 
9 41 A.M. 
29-531 
May 31. 
4 41 P.M. 
0-665 
1846. 
0-723 
0-869 
1847. 
0-859 
0-418 
1848. 
0-961 
0-443t 
The maximum pressure, therefore, at Madras occurred at the same hour annually 
and within a range from the 5th of December to the 24th of January; and the 
minimum pressure occurred between 3^ 41™ and 4^ 41™ p.m., and within the range 
of ten days between the 21st of May and 1st of June. The maximum pressure at 
Dodabetta, in 1847, was on the ITth of March, instead of December or January, as at 
Madras, but the minimum occurred in June, as at Madras. The Poona maximum 
was in January and the minimum in July ; at Bombay, in 1843, the maximum pres- 
sure occurred on the same day and the same hour as at Madras, and the minimum 
pressure occurred equally in May, but on the 16th instead of the 21st of May. These 
facts Dr. Buist recoided in a series of meteorological observations, taken hourly in 
Bombay for the year 1843, on the opposite side of the peninsula from Madras ; and in 
his tables it is stated that the maximum pressure of the atmosphere, 30T 36, occurred 
on the 24th of January at 10 a.m., and the minimum pressure, 29‘431, on the 16th of 
May, before the monsoon set in, at 4 p.m. ; the extreme range therefore being 0'705, 
while the extreme range at Madras in that year was 0’952, but the mean of the five 
years at Madras was 0735. In Bombay, in 1844, the range was ’6C ' from 30'119 on 
the 13th of January to 29'458 on the 4th of June. At Calcutta unfortunately the obser- 
vations were not taken hourly, and exact data are not attainable; but the record in 
1846 states that the maximum pressure occurred on the 12th of January at 9'‘ 50™ a.m., 
viz. 30*225, and the minimum on the 25th of July at 4 p.m. 29*356, the annual range 
therefore 0*869. In 1847 the barometer stood highest on the 5 th of February at 9*^ 50™, 
being 30*169, and the least pressure was on the 25th of May, at sunset, 29*310, the 
annual range therefore 0*859, singularly approximating to that of the preceding year, 
but in both years being greater than at Madras or Bombay. In 1848, at Calcutta, 
the maximum pressure was on the 24th of December 30*231 (9th of February 30*200, 
and 16th of February 30*191), and the minimum pressure on the 20th of July 29*270 
(on 18th of June 29*353, and on 20th of May 29*459), the extreme range in the year 
* For 1830. t For ton months of 1828-29. 
2 R 
MDCCCL. 
